The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 17, 2007
Filed:
Oct. 22, 2004
Kyugo Hamai, Yokosuka, JP;
Hideki Sekiguchi, Takasaki, JP;
Shogo Miyamoto, Hitachinaka, JP;
Yoshikazu Tanaka, Miyagi, JP;
Kyugo Hamai, Yokosuka, JP;
Hideki Sekiguchi, Takasaki, JP;
Shogo Miyamoto, Hitachinaka, JP;
Yoshikazu Tanaka, Miyagi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The invention provides a power transmission apparatus for vehicle which can realize a high torque transmission efficiency and a high reduction gear ratio of a reduction gear unit with a more compact structure, and a vehicle-driving electric machinery system using the power transmission apparatus for vehicle. The power transmission apparatus for vehicle comprises a motor, a reduction gear unit for decelerating power outputted from the motor, and a differential gear unit for distributing the power decelerated by the reduction gear unit to left and right wheels. The reduction gear unit is a reduction gear mechanism including a plurality of gears mounted over a shaft which is rotatably held by a housing in a fixed position. The reduction gear unit and the differential gear unit are arranged within an area in oppositely facing relation to an axial end surface of the motor.